Added Links.md for resources related to ColorHashSharp

Author: Jose A. Fernandez

Links.md

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+# ColorHashSharp resources links
+
+#### Links
+- [Packaging Icon within the nupkg](https://github.com/NuGet/Home/wiki/Packaging-Icon-within-the-nupkg)
+- [Supporting Multiple Target Frameworks](https://learn.microsoft.com/en-us/nuget/create-packages/supporting-multiple-target-frameworks)
+- [NuGet Package Explorer](https://apps.microsoft.com/detail/9WZDNCRDMDM3?hl=en-us&gl=AR&ocid=pdpshare)
+- [NuGet Package Explorer GitHub](https://github.com/NuGetPackageExplorer/NuGetPackageExplorer)